Lord luv a duck.....isn't this about the third (or maybe more) repeat of this discussion in the last three or four years? Hey Rob - glad to see you still around. Looks like you haven't killed too many brain cells with your unvented heater.... :o) Nathan - love your postings. Don't see you carrying a lot of baggage or prejudice into them, but do see you using common sense together with a scientific way of thinking. I have come to realize (through experience) that common sense is sometimes left at the road side by some people the higher their level of formal education is. As to your statement of "Tradesmen often suggest what they are comfortable with, what they've used...", can also sometimes be tied to what company (brand) gives them the best "goodies". Same holds true with the (usually) new meds doctors prescribe so freely. stressbaby - Evidently you are in the medical field. Now, I agree scientific evidence is very important, but so is common sense. Let's be realistic - the scientific evidence collected by the experts (and I have come to use that term loosely, especially when talking about some governmental agencies) which was generated by the studies on the safety of Vioxx for human consumption really didn't amount to diddly squat, did it! Now, before you become unhinged on me, don't you think that rather than continuing to label unvented heaters as unsafe and undesirable, you might want to work on the statement you made, namely "If it has not already been done, we need a way to accumulate data on the safety of these heaters in hobby greenhouses...we need a way to obtain level II evidence of their safety." I'm sure that people on this site that have vented and unvented heaters would be more than willing to share their experiences in a poll (and no, probably none of us are scientists, but I'm sure we can make "common sense" observations as to the color of flame, odor, plant growth or lack of, did the heater continuously refuse to burn, etc.). Of course I understand we would not be able to do "double blind" studies, but hey, some attempt to collect and interpret data is better than continual *itching and holier than thou attitudes that have on occasion invaded discussion of this particularly volatile subject, don't you think. I'm sure you are quite capable of coming up with questions that could be answered by all of us in a manner that would lead to measurable data. Then, we could just point to the data collection and interpretation of same whenever this question comes up! Actually, it could probably be posted in the FAQ area. That, quite honestly, would be great. cuestaroble - I read the information on the site you gave the link to, and although it stated problems, it also stated correcting measures to take none of them were drastic, and most of them were what ghse owners already have in place. And, of course the plants mentioned showing the damage (tobacco and tomatoes) are two very sensitive plants. Sometimes looking at tomatoes with the head tilted wrong causes them to have problems :o)...just joking, but you know what I mean - they really are sensitive, especially at their early growth stages. stressbaby, I've had a few of those patients in CCU/MICU who had taken Vioxx, and my husband was taking it before his MI. I'm an RN and a small commercial grower. Mary

It is likely air in the line leading from main to heater. I suggest haveing the propane company send someone back out because their service call is much cheaper than a plumber's. Relighting it yourself based on instructions gleaned on the net is not a good idea. . Time for a story about tinkering with propane gas. Man jumped out of a plane for his first parachute jump. Unfortunatly he wasn't paying attention when given instructions earlier about operating his chute. Just as he was giving up hope,he sees another man flying up toward him from the ground. As they passed he shouts "hey do you know how to open a parachute? "No,comes the reply,do you know how to light the pilot on a propane water heater?"

I'm in the market now too - what did you end up with @kwuerfl ?

Is your baseboard heat not adequate? I'd rather see the wall drywalled closed since it is between an exterior door and a window. I see electric cords, but not a propane connection. You may want to consider another location and a standard sized fireplace, rather than a petite one crammed in here. I veto the idea.